package demo1;

import java.util.ArrayList;
import java.util.List;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 石方旭
 * Date: 2022-06-28
 * Time: 7:23
 */
public class TestDemo {


    public static void main(String[] args) {
        List<List<Integer>> list = new ArrayList<>();
        List<Integer> list1 = new ArrayList<>();
        list1.add(1);
        list1.add(2);
        System.out.println(list1);
    }

}
